<!DOCTYPE html>
<html>
<head>
    <meta charset="utf-8">
    <title>刘文文</title>
    <link rel="shortcut icon" type="image/png" href="https://qgt-paper.oss-cn-qingdao.aliyuncs.com/upload/2018/bmatch/logo3.png"/>
    <link rel="stylesheet" type="text/css" href="HTMLStart.css">
</head>
<body>
    <div id="only">
        123
    </div>
    <div class="demo">
        465
    </div>
    <h1>这是标题</h1>
    <p>
        This is the start of HTML
    </p>
    <br>
    <a href="https://www.baidu.com">百度一下，你就知道</a>
    <hr>
    <p>this is a new paragraph</p>
    <!-- 这是备注 -->
</body>
</html>